<template>
<div>
  <!-- 面包屑导航区-->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>权限管理</el-breadcrumb-item>
    <el-breadcrumb-item>角色列表</el-breadcrumb-item>
  </el-breadcrumb>

<!--  卡片视图-->
  <el-card>
<!--    添加角色按钮区域-->
    <el-row>
      <el-col>
        <el-button type="primary"
        @click="addRoleDialogVisible = true">添加角色</el-button>
      </el-col>
    </el-row>
<!--    角色列表区-->
    <el-table :data="rolesList" border stripe>
<!--      展开列-->
      <el-table-column label="展开"  type="expand">
        <template slot-scope="scope">
          <el-row
            :class="['bdbottom', i1==0 ? 'bdtop' : '','vcenter']"
            v-for="(item1,i1) in scope.row.children"
            :key="item1.id">
<!--            渲染一级权限-->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row,item1.id)">
                {{item1.authName}}
              </el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
<!--            渲染二级和三级权限-->
            <el-col :span="19">
<!--              通过 for 循环 嵌套渲染二级权限-->
              <el-row
                :class="[i2 === 0 ? '' : 'bdtop','vcenter']"
                v-for="(item2,i2) in item1.children"
                :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success"
                          closable @close="removeRightById(scope.row,item2.id)">
                    {{item2.authName}}
                  </el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--                三级权限-->
                <el-col :span="18">
                  <el-tag v-for="(item3) in item2.children"
                          :key="item3.id" type="warning"
                          closable @close="removeRightById(scope.row,item3.id)">
                    {{item3.authName}}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
<!--          <pre>{{scope.row}}</pre>-->
        </template>
      </el-table-column>
<!--      索引列-->
      <el-table-column label="#" type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button size="mini" type="primary" icon="el-icon-edit"
            @click="showRoleEditDialog(scope.row.id)">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete"
            @click="removeRoleById(scope.row.id)">删除</el-button>
          <el-button size="mini" type="warning"
                     icon="el-icon-setting"
                     @click="showSetRightDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>
  </el-card>

<!--  分配权限的对话框-->
  <el-dialog
    title="分配权限"
    :visible.sync="setRightDialogVisible"
    width="50%" @close="setRightDialogClosed">
<!--    树形控件-->
    <el-tree :data="rightsList" :props="treeProps"
             show-checkbox node-key="id" default-expand-all
             :default-checked-keys="defKeys"
             ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
  </el-dialog>

  <!--  添加角色对话框-->
  <el-dialog
    title="添加角色"
    :visible.sync="addRoleDialogVisible"
    width="50%"
    @close="addRoleDialogClosed">
    <!--    内容主体区-->
    <el-form :model="addRoleFrom" :rules="addRoleFromrules"
             ref="addRoleFromRef" label-width="80px">
      <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="addRoleFrom.roleName"></el-input>
      </el-form-item>
      <el-form-item label="角色描述" prop="roleDesc">
        <el-input v-model="addRoleFrom.roleDesc"></el-input>
      </el-form-item>
    </el-form>
    <!--    底部区域-->
    <span slot="footer" class="dialog-footer">
    <el-button @click="addRoleDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRole">确 定</el-button>
  </span>
  </el-dialog>

  <!--  修改角色的对话框-->
  <el-dialog
    title="修改角色"
    :visible.sync="editDialogVisible"
    width="50%"
    @close="editDialogClosed">
    <!--    内容主体区-->
    <el-form :model="editFrom" :rules="addRoleFromrules"
             ref="editFromRef" label-width="80px">
      <el-form-item label="角色Id" prop="roleId">
        <el-input v-model="editFrom.roleId" disabled></el-input>
      </el-form-item>
      <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="editFrom.roleName"></el-input>
      </el-form-item>
      <el-form-item label="角色描述" prop="roleDesc">
        <el-input v-model="editFrom.roleDesc"></el-input>
      </el-form-item>
    </el-form>
    <!--    底部区域-->
    <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRoleInfo">确 定</el-button>
  </span>
  </el-dialog>
</div>
</template>

<script>
import qs from 'qs'

export default {
  name: 'Roles.vue',
  data() {
    return {
      //  所有角色列表数据
      rolesList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选定的id值
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 控制添加角色对话框的显示与隐藏
      addRoleDialogVisible: false,
      // 添加角色表单数据
      addRoleFrom: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色表单验证规则
      addRoleFromrules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名称',
            tigger: 'blur'
          },
          {
            min: 1,
            message: '角色名不能为空',
            tigger: 'blur'
          }
        ]
      },
      // 控制修改角色对话框显示与隐藏
      editDialogVisible: false,
      // 修改角色信息数据
      editFrom: {}
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolesList = res.data
      // console.log(this.rolesList)
    },
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功！')
      // 防止用户列表更新
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      // console.log(this.rightsList)
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id,并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含children 属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 监听添加角色对话框的关闭事件
    addRoleDialogClosed() {
      this.$refs.addRoleFromRef.resetFields()
    },
    // 添加角色
    addRole() {
      this.$refs.addRoleFromRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        // 可以发起添加角色请求
        const { data: res } = await this.$http.post('roles', qs.stringify(this.addRoleFrom))
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }
        this.$message.success('添加用户成功！')
        // 隐藏添加角色的对话框
        this.addRoleDialogVisible = false
        // 重新获取角色列表数据
        this.getRolesList()
      })
    },
    // 展示修改角色信息的对话框
    async showRoleEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.editFrom = res.data
      this.editDialogVisible = true
    },
    // 通过 id 删除角色
    async removeRoleById(id) {
      // 弹框询问用户是否删除角色数据
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },
    // 监听修改角色对话框关闭事件
    editDialogClosed() {
      this.$refs.editFromRef.resetFields()
    },
    // 修改角色信息并提交
    editRoleInfo() {
      this.$refs.editFromRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editFrom.roleId, qs.stringify({
          roleName: this.editFrom.roleName,
          roleDesc: this.editFrom.roleDesc
        }))
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功！')
      })
    }
  }
}
</script>

<style scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
